Harmonic Balancers

Which damper should sit at the front of the crankshaft when the engine in your project needs to handle more revs and more power? This category contains harmonic balancers that dampen the crankshaft's torsional vibrations. They are for you if you want to replace a worn original or upgrade to a performance damper.

What a harmonic balancer does

Every ignition gives the crankshaft a slight twist, and at certain rpm these torsional vibrations can amplify each other. A harmonic balancer on the nose of the crankshaft is designed to dampen them, so the load on the crank, bearings and belt drive can be reduced. The original damper is typically tuned to the engine's stock output, and the rubber in many original dampers can deteriorate over time. This category includes steel dampers from Fluidampr, e.g. for Toyota 1JZ/2JZ, Honda S2000 F20C/F22C, Mazda MX-5 2.0L, Toyota GR86/Subaru BRZ as well as VW Golf, VW Passat and Audi TT with TSi engines.

How to choose the right damper

• Engine code and model year: The damper must fit the specific engine, so compare the product name with your car's engine code and model year.
• Balancing: The products here are internally balanced and therefore only belong on an engine that is also internally balanced.
• Fitment: Look for details such as the number of bolt holes, a dry-sump pulley or an included adapter kit, as on the GR86/BRZ version.
• Diameter and clearance: The diameter, e.g. 8.5 inches on one of the 1JZ/2JZ versions, can affect the clearance around belts and pulleys.

Installation and accessories

A harmonic balancer is tightened to a high torque on the crankshaft. So use a suitable puller and installation tool, and follow the manufacturer's torque specifications. You will find bolts and washers under harmonic balancer hardware, while other solutions are found among crank dampers. The entire range is gathered under harmonic balancers.

Frequently asked questions

Can I use an internally balanced damper on an externally balanced engine?

No, you should not. An externally balanced engine relies on a specific imbalance in the damper, and the wrong type can cause vibrations and extra load. Check the engine's balancing before you choose a part number.

How can I tell if my harmonic balancer is worn?

Typical signs are cracks or bulges in the rubber, an outer ring that has shifted relative to the hub, or new vibrations. Timing marks that no longer line up can also be caused by a shifted ring.

Do I need a new bolt when fitting a new damper?

It depends on the engine. Some crank bolts are torque-to-yield bolts that may only be used once, so check the manufacturer's instructions. You will find new bolts and washers among the harmonic balancer hardware.